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Title: Mapping QTL for Soft Wheat Quality in Multiple Populations

item SMITH, N - OSU
item Souza, Edward

Submitted to: Progress in Mapping of Wheat and Related Species
Publication Type: Abstract Only
Publication Acceptance Date: 4/21/2008
Publication Date: 9/12/2008
Citation: Sneller, C., Smith, N., Guttieri, M., Souza, E.J. 2008. Mapping QTL for Soft Wheat Quality in Multiple Populations. Progress in Mapping of Wheat and Related Species.EUCARPIA General Congress, Sep 9-17, 2008, Universidad Politecnica de Valencia, Valencia Spain.

Interpretive Summary:

Technical Abstract: Soft wheat is used to make a wide variety of products and thus variation for quality parameters is important to breed soft wheat cultivars suitable for different uses. Breeders need more knowledge about the genetics of soft wheat quality and systems for marker-assisted selection (MAS). MAS is best for loci and alleles that have positive effects on the trait over multiple genetic backgrounds. Progress has been limited in the past due to the cost of obtaining quality phenotype data and the paucity of suitable mapping populations. Recent development of solvent retention capacity (SRC) tests for quality and new funding for US wheat mapping efforts have removed these impediments. Our objective is to elucidate the genetics of soft wheat quality to better manage this variation and developed systems MAS. We will map soft wheat quality using seven biparental mapping populations, each with at least 150 RILs, 250 markers, and tested in four environments for eight quality parameters. The quality traits include SRC tests for pentosan, starch damage, gluten strength, and water absorption along with flour yield, flour protein, test weight, and softness equivalent. We will assess QTLs in each population and compare results over populations. A review of results from mapping in five populations using data from at least two environments will be presented.